Socket for concrete construction.



F.- M. BARTON.-

SOCKET FOR CONCRETE CONSTRUCTION.

APPLICATION FILED gown, 1-912.

l lflgfig v Patented 3111376, 1915.

M d/z: wzzo 5 i W WM FRANCIS M. BARTON, OF CHICAGO, ILLINOlr.

SOCKET FOR CONCRETE CONSTRUCTION.

Specification of Letters Patent.

Patented July 6, 1915.

Application filed November 11, 1912. Serial No. 730,566.

To aZZ 1071 run it may concern:

Be it known that I, FRANCIS M. BARTON, of Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Sockets for Concrete Construction, of which the following is aspecification.

My invention relates generally to metallic sockets to be inserted inconcrete, for lag or machine screws.

It has heretofore been the practice to make sockets of'cast iron whichrequired drilling and threading, and being of cast material, suchsockets had little strength and were very expensive, and it is thepurpose of this invention to produce a socket that will not easilybreak, and will require no drilling or threading, and will save the costof drilling and threading.

My invention is clearly illustrated in'the accompanying drawings, fullydescribed in the following paragraphs of these specifications, andparticularly referred to in the appended claims.

In the drawings referred to, Figure 1 is a section through socketconstruction in accordance with my invention. Fig. 2 is a plan of thesocket. Fig. 3 is a means for holding the socket in place during thetime the concrete is soft. Fig. 4 is an elevation of the lag screw, andan elevation and a section of the socket.

Similar letters refer to similar parts throughout the several views: Abeing for the socket; B for the staple; C for the temporary forms; D forthe temporary wood fastening means; E for the nail which holds fasteningmeans to wood forms; F for the lag screw.

In the practical application of my invention, I vary the constructionsomewhat, as the exigencies of the case may require. For example, thesocket is formed of round wire, A, as shown in Fig. l and Fig. 4, into acylinder having a continuous rib or thread, A, winding spirally at aconstant inclination, the end of said cylinder being closed by drawingthe end of cylinder to a point as indicated by A In forming said socket,I draw wire over a male screw, F, of proper size, said wire being thesame in diameter as the pitch of the threads on the male screw.-

The socket is formed so that the oppositefaces of the coils contact witheach other and thus provide a closed socket which excludes the filling Gfrom entering the opening adapted to receive the lag screw F.

The arm, A is to fasten the socket to wood forms by means, B, so that itwill not be raised off spindle, D, while concrete or plastic material issoft. The arm, A also assists in holding the socket firm in theconcrete, G, while the lag screw or machine screw is being installed inthe socket. The nail. or means, E, is to fasten the spindle, D, to formC; The use of nail or means, E, and spindle, D, and staple or means, B,is to secure the socket composed of A, A and A in position while theconcrete or plastic substance, G, is still soft or plastic. The spindleD is also a means of stopping the concrete or plastic material, G, fromentering the inside of the socket between form C and socket A, whenconcrete or plastic material G is soft.

The socket A is held firmly in concrete or plastic material G by theadhesion of the concrete to the wire and also by the natural mechanicalbond or corrugation formed by the wire being formed into circularinclined spiral rings.

The thread of the lag screw or machine screw F, must fit the groovebetween the winding of the socket A; the socket A being a cylinderhaving a continuous rib or thread winding spirally at a constantinclination, and constituting a female thread into which the male threadof the lag screw or machine screw F is threaded or screwed.

Having this described the invention, what I claim as new and desire tosecure by Letters Patent, is:

1. In concrete construction, the combination of metallic socket composedof spirally wound wire, the windingsbeing in contact with one another toexclude a plastic filling from the inside of the socket and a screwhaving threads of a depth and pitch corresponding to and fitting in thegroove formed between said windings, so that the screw will not spreadapart the windings of the socket.

2. In concrete construction, the combination of metallic socket composedof spirally wound wire, a filling in which the outer portions of thewindings are embedded so that they will be rigidly secured therein, theadjacent windings contacting with one another to exclude the fillingfrom the inside of the socket, and a screw having threads of a depth andpitch corresponding with and fitting in the groove between thesuccessive spirals and formed so that they will not spread the spiralsapart. 1 3. In concrete construction, the combination of a filling, ametallic socket composed of spirally-wound wire, the windings being incontact with one anotheroto exclude the filling from the inside of thesocket, a screw end nzeenset, the outer efid ofthe socket,

whereby the socketwill he held in place be fore the filling is laidaround the socket, the

Wire at the inner end of the socket being Wound to form a closed taperedend .to exclude the filling from the inner end of the sockti I FRANCISM. BARTON.

Witnesses: lBnno (lemon,

7 STUMEF.

